<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style>
    div{
      width: 257px;
      height: 300px;
      border: 1px solid #000;
      margin:100px auto;
      overflow: hidden;
    }
    img{
      transition:transform 0.5s;
    }
    div:hover img{
      transform:scale(1.3);
    }
  </style>
</head>
<body>
  <div>
    <img src="baby0.jpg" alt=""/>
  </div>
</body>
</html>